Voltage sag mitigation using direct converter based DVR without error signal

• Autorzy: Rahman S. Abdul , Mitiku Estifanos Dagnew , Mule Shumye Birhan , Aduye Gebrie Teshome , Huluka Mekete Asmare , Mesfin Solomon

Identyfikatory

DOI

10.15199/48.2021.12.05

Warianty tytułu

PL

Łagodzenie zapadów napięcia za pomocą DVR opartego na bezpośrednim konwerterze bez sygnału błędu

• Języki publikacji: EN

Abstrakty

EN

Dynamic voltage restorer is considered to be one of the best device to compensate voltage sag and swell. Recently the DVRs based on direct converters are very popular and works are getting published for various topologies and modulating techniques to explore the efficiency and worth of the same. In this paper, the direct converter is realized using only two bidirectional switches, in order to mitigate voltage sag. The voltage required to compensate the voltage sag is taken from the same phase where the voltage sag has occurred. The direct converter is connected between the line in which the voltage sag has occurred and the series transformer. In the conventional PWM generation technique, the supply voltage is measured and compared with the reference voltage in order to find out the voltage sag and the error voltage signal. This error signal will be compared with the carrier to generate the PWM pulses. Though already papers have been published to mitigate voltage sag using direct converter, in this paper, as one of the efforts to show the flexibility of the direct converter based DVR, the voltage sag is mitigated without measuring the supply voltage and without generating the error signals, since the power required to mitigate the sag is taken from the phase where it occurred. Ordinary PWM technique is used to control the bidirectional switches. In this proposed methodology the DVR is able to compensate 22% of voltage sag. The simulation is carried out in Matlab Simulink and the results are presented for verification

PL

Dynamiczny restorer napięcia jest uważany za jedno z najlepszych urządzeń do kompensacji zapadów i wzrostów napięcia. Ostatnio bardzo popularne są rejestratory DVR oparte na konwerterach bezpośrednich i publikowane są prace dla różnych topologii i technik modulacji w celu zbadania ich wydajności i wartości. W niniejszym artykule przekształtnik bezpośredni jest realizowany przy użyciu tylko dwóch dwukierunkowych przełączników, w celu złagodzenia zapadu napięcia. Napięcie wymagane do skompensowania zapadu napięcia jest pobierane z tej samej fazy, w której wystąpił zapad napięcia. Przetwornik bezpośredni jest podłączony między linią, w której wystąpiło zapad napięcia, a transformatorem szeregowym. W konwencjonalnej technice generowania PWM napięcie zasilania jest mierzone i porównywane z napięciem odniesienia w celu określenia zapadu napięcia i sygnału błędu napięcia. Ten sygnał błędu zostanie porównany z nośnikiem w celu wygenerowania impulsów PWM. Chociaż opublikowano już artykuły mające na celu złagodzenie zapadu napięcia za pomocą bezpośredniego konwertera, w tym artykule, jako jeden z wysiłków mających na celu pokazanie elastyczności rejestratora opartego na bezpośrednim konwerterze, zapad napięcia jest łagodzony bez pomiaru napięcia zasilania i bez generowania sygnałów błędu , ponieważ moc wymagana do złagodzenia zwisu jest pobierana z fazy, w której wystąpił. Do sterowania przełącznikami dwukierunkowymi wykorzystywana jest zwykła technika PWM.

Słowa kluczowe

EN

dynamic voltage restorer; voltage sag; direct converter; series transformer; Matlab Simulink; without error signal

PL

przywracanie napięcia dynamiczne; zapad napięcia; konwerter bezpośredni; transformator szeregowy

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2021
• Tom: R. 97, nr 12
• Strony: 34--37
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Rahman S. Abdul

• Institute of Technology, University of Gondar, Ethiopia

autor

Mitiku Estifanos Dagnew

• Institute of Technology, University of Gondar, Ethiopia

autor

Mule Shumye Birhan

• Institute of Technology, University of Gondar, Ethiopia

autor

Aduye Gebrie Teshome

• Institute of Technology, University of Gondar, Ethiopia

autor

Huluka Mekete Asmare

• Institute of Technology, University of Gondar, Ethiopia

autor

Mesfin Solomon

• Institute of Technology, University of Gondar, Ethiopia

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).